The Long Night of Museums is one of Berlin's best-known events. In the altogether 37 nights over a million tickets have been sold. Founded in Berlin in 1997, the Long Night of Museums has been copied many times all over the world. Kulturprojekte Berlin asked us to develop the event's interactive concept, including a live twitter wall on Humboldt Forum and the event website with input forms and APIs for all participating museums. The event's design changes every year, take a look at lange-nacht-der-museen.de